Wire drawing machine and process of threading the same



Y Sept.` 1, 1931. E. J. MclLvRlvED WIRE DRAWING MACHINE AND PROCES-S OF THREADING THE SAME Filed July 8, 1929 llllll A TTORNEYS.

Patented Sept. 1, 1931 UNITED STATES PATENT OFFICE EDW'IN 11./ MC'ILVRIED, OF CLEVELAND, OHIO, .ATSSIGNOR T0 THE VAUGHN MACHINERY COMPANY, 0F CUYAHOGA`FALLS, OHIO v WIRE DRAWING AND PROCESS 0F THREADING THE SAME Application med July s, 1929. serial No. 376,542.

The present invention relates to the art of wire drawing and particularly to improvements in wire drawing machines and processes of threading the same. The invention relates particularly'to that type of machine for making two'drafts simultaneously in one machine. In this form of machine the wire is led through a die, around one surface of a rotary block, through a second die, and then on to the second surface of the block, the two surfaces being of vdii'erential diameters to take care of the attenuation of the wire resulting from, the successive drawing operations. This type of machine is sometimes referred to in the artas a double deck machine. `The invention relates to an improvement in that type of machine whereby the threading of the machine is simplified and improved.

The usual type of double deck machine is threaded by pointing the end of the wire,

passing the wire through a die, catching the point V`of the wire by means of a pincher on the end of the chain which is temporarily attached to the block, and coiling the wire with f the chain around the lower or smaller primary drawing surface of the block. After a few turns of wire are made, the operator detaches the wire from the chain and pincher,

unthreads a portion of the wire, leaving a sufficient number of turns subsequently to draw the wire through the first die. He then passes the leading end ofthe wire through ythe second die, reattaches the chain and pincher and coils the wire on the finishing surface of the block. This is a tedious and time consuming operation and necessarily lowers the efficiency of the machine.

The object of the present inventionis to construct a machine in which the operation of threading may be performed more expeditiously than with the present known forms of drawing machines of this type, and as will be understood from the description and drawings, the improved drawing machine is more efficient and easier to operate than the former types of machines.

The drawings and -description give a detailed disclosure of the preferred embodiment of the invention as known at the present machine as adjusted for 'the preliminary' threading operation; and

Figure 2 is a similar view showing the machine fully threadei and in the condition in which it is operated for production.

i The machinel is mounted upon a base or -stand 1 in which is located the vertical drivingshaft 2, on which the rotary drums or blocks constituting the two decks of the machine are mounted. The blocks consist of the main or'nished wire block 3, the surface 4 of which receives the coil of wire above the lower fiange or apron 5. Beneath the main portion of the block and attached thereto by bolts 12 is located the primary block 8 which is smaller in diameter than the block 4 to compensate for the difference in gage of the partially drawn and the completed wire,vand to give the required differential speeds between the drawing operations. l

Below the surface 8 is mounted the annular cup-shaped or convex stationary shell 10.

Located at the side of the drum is the die carrier or support 16 which is movable or shiftable, being supported for vertical movement on two pivoted links 1 8 and 19 mounted in lugs or supports 20 on the side of the housing 1. Inv order to move the die carrier, the link 19 may be extended to provide an operating lever 22, the opposite end 23 of the lever being provided with a counter-- weight 24 which balances the 'weight of the carrier and the parts supported thereon. It will be observed that the extension 23 is not in alignment with the pivotal points on the lever 22 and the relative angularity of the arms of the lever is such that the movements of the counterpoised parts about the fulcrum or lever 23 will hold the die carrier in its rased or -lowered positions.

On the upper surface of the carrier is located the pivoted die block 28 which is mounted upon a vertical pivot so as to permit the block to oscillate to accommodate the Wire as it accumulates upon the block. In the l die block is located the horizontal pivot 30 on which is mounted the head 32 which is provided with the two openings or seats 33 and 34.

Secured in the seat 33 by bolts 35 is the first or primary die 36 and in the seat 34 is the finishing die 38 secured in position by the bolt 40. On the rear of the die carrier is mounted the bracket 42, on the upper end of which is located the sheave 43.

ln threading the drawing machine, the movable carrier is raised until the lower or primary die is in alignment with the base of the bloclr 3. The end of the wire is pointed, threaded through the die and attached to the pincher and chain 44 which coils it around the surface 4. 'llhe machine is then started in operation and run until slightly more than a sucient number of turns of wire are wound around the block 4 to give the required traction, as shown in full lines in Figure l. 'llhe rotation of the block is then stopped, the pincher and chain detached from the wire', loosened and expanded so that it can be passed over the ange 5 on to the shell. l0, as shown in dotted lines in Figure l, and then the die carrier is lowered. rlhe end of the wire which has been detached from the pincher and chain is then brought around the sheave 43 and passed through the upper or finishing die, attached to the pincher and drawn on to the surface 4. When the drum is again rotated, the wire will wrap around the surface 4 and the coil will tighten up on the surface 8, which will give the operative conditions shown in Figure 2.

lt will be observed that the arrangement shown and described aords a simple'and easily operated means for threading a double deck wire drawing machine. lt is not necessary for the operator to work under the flange 5 for attaching the pincher and threading up the machine as in former types of this machine, and as the work of threading is done from above, the time consumed in this work is greatly reduced.

The principles of the invention, involving the use of a shiftable die holder or carriage, are believed to be wholly new, and as the results are highly advantageous, it is believed that the invention and the claims therefor are entitled to a broad scope of equivalents within the purview of the invention as defined by the prior art.

What is claimed is:

1. The process of threadin a wire drawing machine of the doublel eck type comprising passing the leading end of the wire through the first die, coilin it around the finlshmg surface of the bloc stopping the and the coil of wire at 4 ceiling operation, loosening the coil, shifting the coil bodily to the primary surface of the block, unwinding a sufiicient length of wire from the coil to reach from the primary surface through the finishing die to the finishing surface, and passing the leading end through the finishing die anden to the finishing surface of the block.

2. In a machine for the uses and purposes set forth, the combination of a rotatable block having primary and finishing surfaces of different diameters, the diameter of the primary surface being the smaller, an apron upon the block separating the surfaces, a die carrier movable along the aXis longitudinal of the block, said carrier having a primary and a finishing die therein normally 1n alignment with the primary and finishing surfaces of the block, means for shifting the die carrier to bring the primary die in alignment with the finishing surface while the machine is being threaded, and means to guide the wire from the primary surface to the finishing die.

EDWliN J. MollLVRlED. 

